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ID-COOLING SE-903-XT V2 Black CPU Air Cooler, vs Thermalright Assassin X120 Refined SE CPU Air

Updated July 2026 — ID-COOLING SE-903-XT V2 Black CPU Air Cooler, wins on width, Thermalright Assassin X120 Refined SE CPU Air wins on height and length.

The ID-COOLING SE-903-XT V2 Black offers better value with its compact design and lower price, while the Thermalright Assassin X120 provides robust cooling performance. Both are solid choices depending on user needs.

Why ID-COOLING SE-903-XT V2 Black CPU Air Cooler, is better

Price

ID-COOLING is $2.91 cheaper

Noise

ID-COOLING is designed for lower noise operation

Size

ID-COOLING has a compact design for small cases

Why Thermalright Assassin X120 Refined SE CPU Air is better

Cooling

Thermalright has a higher airflow of 66.17 CFM

Build Quality

Thermalright features a traditional aluminum heatsink cover

Brand Reputation

Thermalright has over 20 years of experience in cooling solutions

Overall score

ID-COOLING SE-903-XT V2 Black CPU Air Cooler,
85
Thermalright Assassin X120 Refined SE CPU Air
78

Specifications

SpecID-COOLING SE-903-XT V2 Black CPU Air Cooler,Thermalright Assassin X120 Refined SE CPU Air
Fan TypePWMPWM
Heat Pipes34
CompatibilityIntel & AMDIntel & AMD
AirflowMax 60 CFMMax 66.17 CFM
InstallationEasyModerate

Dimension comparison

ID-COOLING SE-903-XT V2 Black CPU Air Cooler,Thermalright Assassin X120 Refined SE CPU Air

Overview of CPU Coolers

When selecting a CPU cooler, two compelling options are the ID-COOLING SE-903-XT V2 Black and the Thermalright Assassin X120 Refined SE. The ID-COOLING cooler is priced at $14.99, while the Thermalright model comes in at $17.90, making the ID-COOLING about 17% cheaper. Both coolers promise effective cooling solutions, but their designs and features cater to slightly different user needs.

Design and Build Quality

The ID-COOLING SE-903-XT V2 Black boasts a compact tower design that is particularly well-suited for small and mid-size cases. Its low-profile footprint minimizes interference with RAM and other components, making it an excellent choice for mini-ITX and mATX systems. In contrast, the Thermalright Assassin X120 features a more traditional design with a larger aluminum heatsink cover. While its dimensions are larger, it still fits comfortably in medium-sized cases, offering solid build quality and reliability.

Cooling Performance

The performance of a CPU cooler is crucial for maintaining optimal temperatures, especially during intensive tasks. The ID-COOLING SE-903-XT V2 Black features an upgraded tower heatsink design with direct touch heatpipes, enhancing heat dissipation efficiency. Additionally, its upgraded 100mm PWM fan improves airflow while maintaining a balanced noise level. On the other hand, the Thermalright Assassin X120 utilizes four heat pipes and a TL-C12C PWM fan, delivering a maximum airflow of 66.17 CFM and a noise level of 25.6 dB(A). Both options provide excellent cooling, but the ID-COOLING may offer slightly better performance in compact setups.

Noise Levels

Noise levels are a significant consideration for many users, particularly gamers and those working in quieter environments. The ID-COOLING SE-903-XT V2 Black is designed for low noise operation, making it suitable for both gaming and office use. The upgraded 100mm fan is engineered to maintain a quiet profile while still delivering efficient airflow. Meanwhile, the Thermalright Assassin X120, with its TL-C12C fan, also prioritizes low noise, operating at a maximum of 25.6 dB(A). While both coolers are relatively quiet, users may prefer the ID-COOLING for its focus on minimizing acoustic output.

Compatibility

Compatibility is a key factor when choosing a CPU cooler, especially given the variety of motherboard and CPU configurations available. The ID-COOLING SE-903-XT V2 Black features an upgraded universal mounting bracket that supports both Intel and AMD platforms, simplifying installation. Similarly, the Thermalright Assassin X120 is compatible with a wide range of CPU sockets, including Intel’s 1150, 1151, 1155, and 1200 series, as well as AMD’s AM4 and AM5 sockets. Both coolers offer excellent compatibility, but the ease of installation with the ID-COOLING may appeal more to novice builders.

Aesthetics

Aesthetic appeal is often an important consideration for PC builders looking for a cohesive look. The ID-COOLING SE-903-XT V2 Black is designed with a refined appearance that blends seamlessly into various builds, whether they are gaming, office, or home PCs. Its cohesive look is enhanced by the upgraded fan design. Conversely, the Thermalright Assassin X120 features a more traditional cooler design with an aluminum heatsink cover, which may appeal to users preferring a classic aesthetic. While both coolers have their charm, the ID-COOLING may be favored for its modern and versatile design.

Price Comparison

When it comes to pricing, the ID-COOLING SE-903-XT V2 Black is listed at $14.99, making it a budget-friendly option for those looking to upgrade their cooling solution. In comparison, the Thermalright Assassin X120 is priced at $17.90. This price difference of $2.91 may seem minor, but for budget-conscious consumers, every dollar counts. The lower price of the ID-COOLING cooler does not compromise on performance, making it an attractive option for users seeking value without sacrificing quality.

Which should you buy?

In conclusion, both the ID-COOLING SE-903-XT V2 Black and the Thermalright Assassin X120 Refined SE are solid choices for CPU cooling solutions, each with its unique strengths. The ID-COOLING cooler stands out for its compact design, low noise operation, and budget-friendliness at $14.99. Meanwhile, the Thermalright model excels with its traditional design and robust cooling capabilities for $17.90. Ultimately, your choice should depend on your specific needs: if you require a quieter, compact solution at a lower price, the ID-COOLING is the way to go. However, if you prefer a more traditional design and are willing to invest a little more, the Thermalright Assassin X120 is a strong contender.